I have a 1997 F150 with a 4.6L V8, 148K miles that has a transmission that shutters when I accellerate on the gas. I was planning to have the transmission flushed and replace the fluid but have read some of the posts here and it seems that replacing the plug/plug wires/cap and rotor should fix that problem. Do you agree?

 

I agree they may fix the problem and should be done first..

 

Well, since your truck doues not have a cap and rotor, having the other items done should help your issue. Typically the tranny flush helps a lot.

 

i had the same problem get your tranny fluid changed and ADD Lube Gard in a Red Bottle.I got my at my local Napa parts store.It does work really never had the problem come back.

 

The red lubeguard is to prevent sticky valves. It is good stuff and I won't knock it ,but it would have no effect here. The green lubeguard is mercon V additive to convert mercon to Mercon V. I have tried it a few times and sometimes didn't give me any problems. It doesn't seem to be enough to me, maybe a couple bottles would work, but I'd sooner just buy the mercon V fluid. You just needed to change your fluid or your fluid was low.
Alan